Order of operations PEMDAS parethasees (inner to outer) exponents multiplication and division addition and subtraction remember thah yuo do all these left to right
so
[7-(2-5(4-2)+7)]+2 inner to outer 4-2=2
now we have [7-(2-5(2)+7)]+2 multiply since no further parnthasees 2*5=10
now we have [7-(2-10+7)]+2 add or subtract (subtraction is addition of a negative) 2-10=-8, and -8+7=-1
now we have [7-(-1)]+2 last parenthsees/brackets remember that subtracting a negative is the same as adding a positive 7-(-1)=7+1=8
